Ely Ouse (South Level) Water Body

Moderate ecological status

Attributes

  • Water Body IDGB205033000070
  • Water Body TypeRiver
  • Hydromorphological designationartificial
  • NGRTL5828688560
  • Catchment area46623.816 ha
  • Length87.671 km
  • Catchment area466.238 km2
  • Surveillance Water BodyNo

Classifications

Classification Item2019
EcologicalModerate
Biological quality elementsHigh
FishHigh
InvertebratesHigh
Macrophytes and Phytobenthos Combined
Macrophytes Sub ElementModerate
Physico-chemical quality elementsModerate
Acid Neutralising CapacityHigh
Ammonia (Phys-Chem)High
Dissolved oxygenGood
PhosphateModerate
TemperatureGood
pHHigh
Supporting elements (Surface Water)Moderate
Mitigation Measures AssessmentModerate or less
Specific pollutantsHigh
ArsenicHigh
ChlorothalonilHigh
Chromium (VI)High
CopperHigh
IronHigh
LinuronHigh
ManganeseHigh
PendimethalinHigh
ZincHigh
ChemicalFail
Priority hazardous substancesFail
Benzo(a)pyreneGood
Benzo(b)fluorantheneGood
Benzo(g-h-i)peryleneGood
Benzo(k)fluorantheneGood
Cadmium and Its CompoundsGood
Dioxins and dioxin-like compoundsGood
Heptachlor and cis-Heptachlor epoxideGood
Hexabromocyclododecane (HBCDD)Good
HexachlorobenzeneGood
HexachlorobutadieneGood
HexachlorocyclohexaneGood
Mercury and Its CompoundsGood
NonylphenolGood
PentachlorobenzeneGood
Perfluorooctane sulphonate (PFOS)Fail
Polybrominated diphenyl ethers (PBDE)Fail
QuinoxyfenGood
Tributyltin CompoundsGood
Trifluralin (Priority hazardous)Good
Priority substancesGood
1,2-dichloroethaneGood
AclonifenGood
AlachlorGood
AtrazineGood
BenzeneGood
BifenoxGood
CybutryneGood
Cypermethrin (Priority)Good
DichloromethaneGood
Dichlorvos (Priority)Good
FluorantheneGood
Lead and Its CompoundsGood
Nickel and Its CompoundsGood
PentachlorophenolGood
SimazineGood
TerbutrynGood
TrichloromethaneGood
Other PollutantsGood
Aldrin, Dieldrin, Endrin & IsodrinGood
Carbon TetrachlorideGood
DDT TotalGood
TrichloroethyleneGood
para - para DDTGood

Why do all water bodies have a chemical status of fail?

Investigations into classification status

No data to show

Reasons for not achieving good (RNAG) and reasons for deterioration (RFD)

All reasons (RFDs and RNAGs) attributed to the classification elements in this water body.

Reason TypeSWMIActivityCategoryClassification ElementMore information
RNAGUnknown (pending investigation)Unknown (pending investigation)Sector under investigationPerfluorooctane sulphonate (PFOS)Details
RNAGPhysical modificationOther (not in list, must add details in comments)Local and Central GovernmentMitigation Measures AssessmentDetails
RNAGmeasures delivered to address reason, awaiting recoveryNot applicableNo sector responsiblePolybrominated diphenyl ethers (PBDE)Details
RNAGPhysical modificationOther (not in list, must add details in comments)RecreationMitigation Measures AssessmentDetails
RNAGDiffuse sourcePoor Livestock ManagementAgriculture and rural land managementPhosphateDetails
RNAGDiffuse sourcePoor nutrient managementAgriculture and rural land managementPhosphateDetails
RNAGPhysical modificationOther (not in list, must add details in comments)Agriculture and rural land managementMitigation Measures AssessmentDetails
RNAGPoint sourceSewage discharge (continuous)Water IndustryPhosphateDetails

Reasons for not achieving good status by business sector

The issues preventing waters reaching good status and the sectors identified as contributing to them. The numbers in the table are individual counts of the reasons for not achieving good status with a confidence status of 'confirmed' and 'probable', where the latest classification is less than good status. There may be more than one reason in a single water body. Note, table does not include reasons for deterioration.

Significant water management issuePhysical modificationsPollution from waste waterPollution from towns, cities and transportChanges to the natural flow and level of waterInvasive non-native speciesPollution from rural areasPollution from abandoned mines
Agriculture and rural land management1000020
Industry0000000
Mining and quarrying0000000
Navigation0000000
Urban and transport0000000
Water Industry0100000
Local & central government1000000
Domestic general public0000000
Recreation1000000
Waste treatment and disposal0000000
Other0000000
No sector responsible0000000
Sector under investigation0000000
Total3100020

Objectives

Classification ItemStatusYearReasons
EcologicalModerate2015Disproportionately expensive: Disproportionate burdens;
Disproportionately expensive: Unfavourable balance of costs and benefits;
Technically infeasible: No known technical solution is available
Biological quality elementsGood2015
FishGood2015
InvertebratesGood2015
Macrophytes and Phytobenthos CombinedNot assessed2015Disproportionately expensive: Unfavourable balance of costs and benefits;
Technically infeasible: No known technical solution is available
Physico-chemical quality elementsModerate2015Disproportionately expensive: Unfavourable balance of costs and benefits;
Technically infeasible: No known technical solution is available
Acid Neutralising CapacityGood2015
Ammonia (Phys-Chem)Good2015
Dissolved oxygenGood2015
PhosphateModerate2015Disproportionately expensive: Unfavourable balance of costs and benefits;
Technically infeasible: No known technical solution is available
TemperatureGood2015
pHGood2015
Hydromorphological Supporting ElementsNot assessed2015
Supporting elements (Surface Water)Good2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Mitigation Measures AssessmentGood2027 - Low confidenceDisproportionately expensive: Disproportionate burdens
Specific pollutantsHigh2015
ArsenicHigh2015
ChlorothalonilHigh2015
Chromium (VI)High2015
CopperHigh2015
IronHigh2015
LinuronHigh2015
ManganeseHigh2015
PendimethalinHigh2015
ZincHigh2015
ChemicalGood2063Natural conditions: Chemical status recovery time;
Technically infeasible: No known technical solution is available
Priority hazardous substancesGood2063Natural conditions: Chemical status recovery time;
Technically infeasible: No known technical solution is available
Benzo (b) and (k) fluorantheneGood2015
Benzo (ghi) perelyene and indeno (123-cd) pyreneGood2015
Benzo(a)pyreneGood2015
Benzo(b)fluorantheneGood2015
Benzo(g-h-i)peryleneGood2015
Benzo(k)fluorantheneGood2015
Cadmium and Its CompoundsGood2015
Dioxins and dioxin-like compoundsGood2015
EndosulfanGood2015
Heptachlor and cis-Heptachlor epoxideGood2015
Hexabromocyclododecane (HBCDD)Good2015
HexachlorobenzeneGood2015
HexachlorobutadieneGood2015
HexachlorocyclohexaneGood2015
Mercury and Its CompoundsGood2015
NonylphenolGood2015
PentachlorobenzeneGood2015
Perfluorooctane sulphonate (PFOS)Good2039Technically infeasible: No known technical solution is available
Polybrominated diphenyl ethers (PBDE)Good2063Natural conditions: Chemical status recovery time
QuinoxyfenGood2015
Tributyltin CompoundsGood2015
Trifluralin (Priority hazardous)Good2015
Priority substancesGood2015
1,2-dichloroethaneGood2015
AclonifenGood2015
AlachlorGood2015
AtrazineGood2015
BenzeneGood2015
BifenoxGood2015
CybutryneGood2015
Cypermethrin (Priority)Good2015
DichloromethaneGood2015
Dichlorvos (Priority)Good2015
FluorantheneGood2015
Lead and Its CompoundsGood2015
Nickel and Its CompoundsGood2015
PentachlorophenolGood2015
SimazineGood2015
TerbutrynGood2015
TrichloromethaneGood2015
Other PollutantsGood2015
Aldrin, Dieldrin, Endrin & IsodrinGood2015
Carbon TetrachlorideGood2015
DDT TotalGood2015
TrichloroethyleneGood2015
para - para DDTGood2015

Protected areas

PA NameIdDirectiveMore information
Ely Ouse and Cut-off channel NVZS390Nitrates Directive
Ouse WashesUK9008041Special Protection AreaNatural England
Anglian ChalkG71Nitrates Directive
Sandringham Sands SouthG150Nitrates Directive
Ouse WashesUK11051Ramsar SiteNatural England
Ouse WashesUK0013011Special Area of ConservationNatural England
Old West & Ely OuseUKENRI90Urban Waste Water Treatment Directive
Relief Channel/Polver drain NVZS834Nitrates Directive
Little OuseUKENRI71Urban Waste Water Treatment Directive
River LarkUKENRI69Urban Waste Water Treatment Directive
Soham LodeUKENRI64Urban Waste Water Treatment Directive

Monitoring sites which have been used to classify this water body

Shows which sites were used for classification for which years within each cycle.

Monitoring SiteCycle 1Cycle 2Cycle 3
TEN MILE R. BRANDON CREEK 40M022013, 2016, 2019, 20152019
SOHAM LODE BARWAY RD.BR. 36M102013, 2016, 2014, 2019, 20152019
56017 560172016, 2015, 2013
56010 560102016, 2014, 2015, 2013
LOWER OUSE/LT OUSE/D/S LT OUSE/PLANTATION FARM/ 46092016
LOWER OUSE/LARK/D/S LARK/PRICKWILLOW/ 44912013, 2016, 2019, 2014, 20152019
R.WISSEY A10 RD.BR.HILGAY 50M022013, 2016, 2014, 2019, 20152019
LOWER OUSE/WISSEY/D/S WISSEY/HILGAY MOORINGS/ 46572013, 2016, 2014, 2015
56013 560132016, 2014, 2015
56009 560092016, 2014, 2015, 2013
TEN MILE R. DENVER SLUICE 51M012015, 2016
R.WISSEY FIVE MILE RD.BR.WISSINGTON 50M012015, 2016
TEN MILE R. TEN MILE BANK BRIDGE HILGAY 47M012013, 2016, 2014, 2019, 20152019
LT.OUSE R. LITTLE OUSE RD.BR. 46M072013, 2016, 2014, 2019, 20152019
ELY OUSE CUCKOO RD.BR.ELY 36M032013, 2016, 2014, 2019, 20152019
56032 560322016, 2014, 2015
LOWER OUSE/ELY OUSE/SANDHILLS BRIDGE/ 48042013, 2016, 2019, 2014, 20152019
56016 560162016, 2015, 2014
LOWER OUSE/LT OUSE/D/S LT OUSE/LITTLE OUSE VILLAGE/ 46112013, 2016, 2014, 2015
LOWER OUSE/SOHAM LODE/SOHAM COTES/ 48122016, 20192019
56039 560392016, 2015, 2013
56388 563882016, 2014, 2015, 2013
R.LARK PRICKWILLOW RD.BR. 39M032016, 2013, 2014, 2019, 20152019

Downstream water bodies